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Differential D25029 Diff 72327 sbin/ifconfig/ifconfig.c

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sbin/ifconfig/ifconfig.c

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int supmedia = 0; int supmedia = 0;
int printkeys = 0; /* Print keying material for interfaces. */ int printkeys = 0; /* Print keying material for interfaces. */
int exit_code = 0; int exit_code = 0;
/* Formatter Strings */ /* Formatter Strings */
char *f_inet, *f_inet6, *f_ether, *f_addr; char *f_inet, *f_inet6, *f_ether, *f_addr;
static bool group_member(const char *ifname, const char *match);
static int ifconfig(int argc, char *const *argv, int iscreate, static int ifconfig(int argc, char *const *argv, int iscreate,
const struct afswtch *afp); const struct afswtch *afp);
static void status(const struct afswtch *afp, const struct sockaddr_dl *sdl, static void status(const struct afswtch *afp, const struct sockaddr_dl *sdl,
struct ifaddrs *ifa); struct ifaddrs *ifa);
static void tunnel_status(int s); static void tunnel_status(int s);
static _Noreturn void usage(void); static _Noreturn void usage(void);
static int getifflags(const char *ifname, int us); static int getifflags(const char *ifname, int us);
▲ Show 20 Lines • Show All 281 Lines • ▼ Show 20 Linesmain(int argc, char *argv[])
const struct afswtch *afp = NULL; const struct afswtch *afp = NULL;
int ifindex; int ifindex;
struct ifaddrs *ifap, *sifap, *ifa; struct ifaddrs *ifap, *sifap, *ifa;
struct ifreq paifr; struct ifreq paifr;
const struct sockaddr_dl *sdl; const struct sockaddr_dl *sdl;
char options[1024], *cp, *envformat, *namecp = NULL; char options[1024], *cp, *envformat, *namecp = NULL;
struct ifa_queue q = TAILQ_HEAD_INITIALIZER(q); struct ifa_queue q = TAILQ_HEAD_INITIALIZER(q);
struct ifa_order_elt *cur, *tmp; struct ifa_order_elt *cur, *tmp;
const char *ifname; const char *ifname, *matchgroup;
struct option *p; struct option *p;
size_t iflen; size_t iflen;
int flags; int flags;
all = downonly = uponly = namesonly = noload = verbose = 0; all = downonly = uponly = namesonly = noload = verbose = 0;
f_inet = f_inet6 = f_ether = f_addr = NULL; f_inet = f_inet6 = f_ether = f_addr = NULL;
matchgroup = NULL;
envformat = getenv("IFCONFIG_FORMAT"); envformat = getenv("IFCONFIG_FORMAT");
if (envformat != NULL) if (envformat != NULL)
setformat(envformat); setformat(envformat);
/* /*
* Ensure we print interface name when expected to, * Ensure we print interface name when expected to,
* even if we terminate early due to error. * even if we terminate early due to error.
Show All 30 Lines case 'n': /* suppress module loading */
noload++; noload++;
break; break;
case 'u': /* restrict scan to "up" interfaces */ case 'u': /* restrict scan to "up" interfaces */
uponly++; uponly++;
break; break;
case 'v': case 'v':
verbose++; verbose++;
break; break;
case 'g':
if (all) {
if (optarg == NULL)
usage();
matchgroup = optarg;
break;
}
/* FALLTHROUGH */
default: default:
for (p = opts; p != NULL; p = p->next) for (p = opts; p != NULL; p = p->next)
if (p->opt[0] == c) { if (p->opt[0] == c) {
p->cb(optarg); p->cb(optarg);
break; break;
} }
if (p == NULL) if (p == NULL)
usage(); usage();
▲ Show 20 Lines • Show All 155 Lines • ▼ Show 20 Lines for (ifa = sifap; ifa; ifa = ifa->ifa_next) {
cp = ifa->ifa_name; cp = ifa->ifa_name;
if ((ifa->ifa_flags & IFF_CANTCONFIG) != 0) if ((ifa->ifa_flags & IFF_CANTCONFIG) != 0)
continue; continue;
if (downonly && (ifa->ifa_flags & IFF_UP) != 0) if (downonly && (ifa->ifa_flags & IFF_UP) != 0)
continue; continue;
if (uponly && (ifa->ifa_flags & IFF_UP) == 0) if (uponly && (ifa->ifa_flags & IFF_UP) == 0)
continue; continue;
if (matchgroup && !group_member(ifa->ifa_name, matchgroup))
continue;
/* /*
* Are we just listing the interfaces? * Are we just listing the interfaces?
*/ */
if (namesonly) { if (namesonly) {
if (namecp == cp) if (namecp == cp)
continue; continue;
if (afp != NULL) { if (afp != NULL) {
/* special case for "ether" address family */ /* special case for "ether" address family */
Show All 26 Lines#endif
} }
if (namesonly) if (namesonly)
printf("\n"); printf("\n");
freeifaddrs(ifap); freeifaddrs(ifap);
done: done:
freeformat(); freeformat();
exit(exit_code); exit(exit_code);
}
/*
* Returns true if an interface ifname should be listed based on rules:
* 1) ifname is a member of interface group;
* 2) ifname is NOT a member of interface group prepended
* with caret: "^group".
*/
static bool
group_member(const char *ifname, const char *match)
{
static int sock = -1;
struct ifgroupreq ifgr;
struct ifg_req *ifg;
int len;
bool findmatch;
/* Sanity checks. */
if (ifname == NULL || match == NULL)
return (false);
memset(&ifgr, 0, sizeof(ifgr));
strlcpy(ifgr.ifgr_name, ifname, IFNAMSIZ);
/* The socket is opened once. Let _exit() close it. */
if (sock == -1) {
sock = socket(AF_LOCAL, SOCK_DGRAM, 0);
if (sock == -1)
errx(1, "%s: socket(AF_LOCAL,SOCK_DGRAM)", __func__);
}
/* Determine amount of memory for the list of groups. */
if (ioctl(sock, SIOCGIFGROUP, (caddr_t)&ifgr) == -1) {
if (errno == EINVAL || errno == ENOTTY)
return (false);
else
errx(1, "%s: SIOCGIFGROUP", __func__);
}
/* Obtain the list of groups. */
len = ifgr.ifgr_len;
ifgr.ifgr_groups =
(struct ifg_req *)calloc(len / sizeof(*ifg), sizeof(*ifg));
if (ifgr.ifgr_groups == NULL)
errx(1, "%s: no memory", __func__);
if (ioctl(sock, SIOCGIFGROUP, (caddr_t)&ifgr) == -1)
errx(1, "%s: SIOCGIFGROUP", __func__);
/* Perform matching. */
findmatch = true;
if (match[0] == '^') {
findmatch = false;
match++;
/* Sanity check. */
if (!*match)
return (false);
}
ifg = ifgr.ifgr_groups;
for (; ifg && len >= sizeof(struct ifg_req); ifg++) {
len -= sizeof(struct ifg_req);
if (strcmp(ifg->ifgrq_group, match) == 0)
return (findmatch);
}
return (!findmatch);
} }
static struct afswtch *afs = NULL; static struct afswtch *afs = NULL;
void void
af_register(struct afswtch *p) af_register(struct afswtch *p)
{ {
p->af_next = afs; p->af_next = afs;
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